Add a confirmation prompt to app uninstallation on the ntp.

chrome/browser/resources/ntp/apps.js

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 function getAppsCallback(data) {
   logEvent('received apps');
   var appsSection = $('apps');
   var appsSectionContent = $('apps-maxiview');
   var appsMiniview = appsSection.getElementsByClassName('miniview')[0];
   appsSectionContent.textContent = '';
   appsMiniview.textContent = '';
 
   if (data.apps.length == 0) {
     appsSection.classList.add('disabled');
+    layoutSections();
     return;
   }
 
   data.apps.forEach(function(app) {
     appsSectionContent.appendChild(apps.createElement(app));
   });
 
   appsSectionContent.appendChild(apps.createWebStoreElement());
 
   data.apps.slice(0, MAX_MINIVIEW_ITEMS).forEach(function(app) {
@@ skipping 165 matching lines @@
 
     createWebStoreElement: function() {
       return createElement({
         'id': 'web-store-entry',
         'name': localStrings.getString('web_store_title'),
         'launch_url': localStrings.getString('web_store_url')
       });
     }
   };
 })();